/* Original native CSS. A calm editorial aesthetic, not an official Apple UI. */
:root{color-scheme:light;--bg:#f6f8f5;--paper:#fff;--ink:#202b25;--muted:#5c6960;--accent:#206346;--soft:#e6eee6;--line:#d5ded5;--radius:22px;font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;font-synthesis:none;line-height:1.7;color:var(--ink);background:var(--bg)}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:100px}body{margin:0}button,input{font:inherit}button,a,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer}a{color:var(--accent);text-underline-offset:5px;text-decoration-thickness:1px}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid var(--accent);outline-offset:5px}button{color:inherit}button:disabled{cursor:default}p,h1,h2,h3{margin:0}p{overflow-wrap:anywhere}h1,h2,h3{line-height:1.3;text-wrap:balance}h1{font-size:clamp(36px,4.5vw,60px);letter-spacing:-.055em;font-weight:650}h1 span{color:var(--accent)}h2{font-size:clamp(28px,3vw,38px);letter-spacing:-.035em;font-weight:620}h3{font-size:23px;font-weight:620;letter-spacing:-.025em}[hidden]{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.skip{position:fixed;top:6px;left:12px;z-index:100;background:white;padding:10px 16px;transform:translateY(-150%)}.skip:focus{transform:none}.header{position:sticky;top:0;z-index:10;display:flex;align-items:center;justify-content:space-between;max-width:1200px;margin:auto;padding:17px 40px;background:rgb(246 248 245 / .96);border-bottom:1px solid var(--line);min-height:72px}.brand{display:inline-flex;align-items:center;gap:10px;color:var(--ink);font-size:20px;font-weight:650;text-decoration:none;white-space:nowrap;letter-spacing:-.04em}.brand-mark{display:grid;place-items:center;background:var(--accent);color:#fff;width:33px;height:33px;border-radius:11px;font-family:Georgia,serif;font-size:27px;font-weight:normal;padding-bottom:5px}nav{display:flex;gap:26px}nav a{text-decoration:none;color:var(--muted);font-size:14px;padding:6px 0}nav a:hover{color:var(--accent)}main{max-width:1120px;margin:auto;padding:0 24px}.hero{display:grid;grid-template-columns:1.12fr 1fr;gap:55px;align-items:center;padding:65px 0 58px}.eyebrow{font-size:13px;color:var(--accent);font-weight:600;letter-spacing:.075em;margin-bottom:18px}.hero-description{font-size:17px;color:var(--muted);margin:23px 0 29px;line-height:1.9}.button{display:inline-flex;justify-content:space-between;align-items:center;gap:30px;min-height:48px;padding:11px 20px;border-radius:12px;border:1px solid transparent;font-weight:550;font-size:15px;text-decoration:none;white-space:nowrap}.primary{background:var(--accent);color:#fff}.primary:hover{background:#174b34}.button span{font-size:20px;line-height:1}.token-demo{padding:26px;background:var(--soft);border-radius:var(--radius);border:1px solid #d5e3d5}.demo-heading{display:flex;align-items:center;justify-content:space-between;font-size:14px;font-weight:600;gap:12px}.mini{font-size:12px;color:var(--muted);font-weight:450}.sentence{display:flex;gap:7px;margin:24px 0 16px;flex-wrap:wrap}.sentence>span{background:#fff;border:1px solid #c9d7c9;border-radius:9px;padding:9px 12px;font-size:16px}.sentence .token-next{background:var(--accent);color:white;min-width:48px;text-align:center}.token-next.pop{animation:pop .26s ease-out}.flow-line{display:flex;align-items:center;gap:14px;margin:18px 0;font-size:11px;color:var(--muted)}.flow-line b{font-weight:450}.flow-line span{flex:1;height:1px;background:#b6cbb9}.candidates{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.candidates>div{background:rgb(255 255 255 / .7);border-radius:12px;padding:10px 12px;display:flex;flex-direction:column}.candidates span{font-size:12px;color:var(--muted)}.candidates strong{font-size:26px;font-weight:550;color:var(--accent);font-variant-numeric:tabular-nums}.range-label{display:grid;grid-template-columns:1fr auto;font-size:12px;margin:14px 0}.range-label input{grid-column:1/-1}.range-label output{color:var(--accent);font-variant-numeric:tabular-nums}input[type=range]{width:100%;min-height:36px;accent-color:var(--accent);cursor:pointer}.demo-button{width:100%;background:white;border-color:#c3d3c3;color:var(--accent)}.demo-button:hover{background:#f4f9f3}.demo-note{font-size:11px;color:#4b6051;line-height:1.65;margin-top:12px;min-height:36px}.demo-explanation{font-size:12px;margin-top:0}.demo-explanation summary{padding:8px 0}.demo-explanation p{padding:0 0 6px;color:var(--muted)}.resume{display:flex;align-items:center;justify-content:space-between;padding:23px 0;border-block:1px solid var(--line);gap:20px}.resume p{font-size:17px;font-weight:550;margin-top:3px}.resume-actions{display:flex;align-items:center;gap:27px}.resume-actions>span{font-size:13px;color:var(--muted)}.resume-actions a{text-decoration:none;font-size:14px;white-space:nowrap}.section{padding:85px 0 0;scroll-margin-top:15px}.section-intro{max-width:630px;margin-bottom:42px}.section-intro>p:last-child{font-size:16px;color:var(--muted);margin-top:16px;line-height:1.9}.section-intro .eyebrow{margin-top:0}.route-layout{display:grid;grid-template-columns:210px 1fr;gap:52px}.route-map{align-self:start;position:sticky;top:112px;font-size:13px;color:var(--muted);padding-top:7px}.route-map ol{list-style:none;padding:0;margin:18px 0 24px;border-left:1px solid var(--line)}.route-map li{padding:8px 0 8px 20px}.route-map a{color:var(--muted);text-decoration:none}.route-map a:hover{color:var(--accent)}.map-note{font-size:12px;line-height:1.9}.stop{display:grid;grid-template-columns:40px 1fr;gap:15px;padding:0 0 37px;margin-bottom:37px;border-bottom:1px solid var(--line);scroll-margin-top:105px}.stop:last-child{margin-bottom:0}.stop-number{font-size:15px;font-weight:500;color:var(--accent);font-variant-numeric:tabular-nums;padding-top:1px}.stop.done .stop-number{background:var(--accent);color:#fff;border-radius:50%;height:30px;width:30px;display:grid;place-items:center;font-size:12px}.meta{font-size:12px;color:var(--muted);margin-bottom:10px}.stop-content h3{margin-bottom:14px}.stop-content>p:not(.meta):not(.source-note){font-size:15px;color:var(--muted);margin-bottom:18px;line-height:1.85}.resource-link{display:inline-block;font-size:15px;line-height:1.8}.source-note{font-size:12px;color:var(--muted);line-height:1.8;margin-top:8px}.stop details{margin-top:19px;font-size:14px}summary{cursor:pointer;min-height:44px;padding:10px 0;color:var(--accent)}.detail-body{padding:7px 0 15px;color:var(--muted);line-height:1.9}.detail-body p{margin-bottom:13px}.detail-body strong{font-weight:600;color:var(--ink)}.complete{font-size:12px;min-height:44px;border:1px solid var(--line);border-radius:10px;background:transparent;padding:8px 14px;margin-top:16px;color:var(--muted)}.complete:hover{border-color:var(--accent);color:var(--accent)}.complete[aria-pressed=true]{background:var(--soft);border-color:#bbd0bc;color:var(--accent)}.lab-tabs{display:flex;border-bottom:1px solid var(--line);gap:28px}.lab-tabs button{border:0;border-bottom:2px solid transparent;background:transparent;font-size:15px;padding:12px 2px;color:var(--muted);min-height:49px}.lab-tabs button[aria-selected=true]{border-color:var(--accent);color:var(--accent);font-weight:600}.lab-panel{display:grid;grid-template-columns:1fr 1fr;gap:60px;background:var(--paper);padding:38px;border-radius:0 0 var(--radius) var(--radius);border:1px solid var(--line);border-top:0;min-height:415px}.lab-description h3{font-size:27px;margin-bottom:18px}.lab-description>p:not(.formula){font-size:14px;color:var(--muted);line-height:1.85}.mode-switch{display:inline-flex;gap:4px;border:1px solid var(--line);border-radius:12px;padding:4px;margin:22px 0 15px}.mode-switch button{background:transparent;border:0;border-radius:8px;padding:8px 27px;min-height:44px;font-size:14px}.mode-switch button[aria-pressed=true]{background:var(--accent);color:#fff}.small{font-size:12px!important;color:var(--muted)}.parameter{display:grid;grid-template-columns:1fr auto;align-items:center;padding:17px 20px;background:var(--soft);border-radius:14px;font-size:12px}.parameter strong{font-size:32px;color:var(--accent);font-weight:550;grid-row:1/3;grid-column:2;font-variant-numeric:tabular-nums}.parameter span:last-child{font-size:11px;color:var(--muted)}.process-steps{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:8px;padding:0;margin:18px 0;counter-reset:process}.process-steps li{counter-increment:process;font-size:12px;padding:10px 8px;border:1px solid var(--line);border-radius:9px;color:var(--muted)}.process-steps li:before{content:counter(process) " ";margin-right:5px;color:var(--accent)}.process-steps li.active{background:var(--soft);border-color:var(--accent);color:var(--ink);font-weight:550}.process-demo>.button{width:100%}.process-status{font-size:12px;color:var(--muted);margin-top:14px;min-height:44px}.formula{font-size:27px;letter-spacing:.04em;color:var(--accent);margin:18px 0;font-family:Georgia,serif}.rank-label{display:flex;align-items:center;justify-content:space-between;font-size:13px;margin-top:18px}.rank-label output{color:var(--accent);font-size:20px}.lora-numbers>div{display:flex;flex-direction:column;padding:15px 18px;border:1px solid var(--line);border-radius:14px;font-size:12px;margin-bottom:12px;color:var(--muted)}.lora-numbers strong{font-size:32px;line-height:1.7;color:var(--ink);font-variant-numeric:tabular-nums;font-weight:550}.lora-numbers .lora-highlight{background:var(--soft);border-color:#d5e3d5;color:var(--accent)}.lora-highlight strong{color:var(--accent)}.lora-numbers>p{font-size:12px;color:var(--muted);margin-top:18px}.check-section{display:grid;grid-template-columns:1fr 1fr;gap:60px;padding-bottom:75px;border-bottom:1px solid var(--line)}.check-section>div>p:last-child{color:var(--muted);font-size:14px;margin-top:18px}.quiz h3{font-size:20px;margin:12px 0 20px}.quiz-options{display:grid;gap:9px}.quiz-options button{text-align:left;background:transparent;border:1px solid var(--line);border-radius:12px;padding:12px 16px;font-size:14px;min-height:48px}.quiz-options button:hover{border-color:var(--accent)}.quiz-options button.selected{background:var(--soft);border-color:var(--accent);color:var(--accent)}#quiz-feedback{font-size:13px;color:var(--muted);margin-top:17px;min-height:66px}.text-button{background:transparent;border:0;color:var(--accent);font-size:12px;padding:10px 0;min-height:44px;text-align:left;text-decoration:underline;text-underline-offset:5px}.filters{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:24px}.filters button{font-size:13px;border:1px solid var(--line);background:transparent;padding:9px 16px;border-radius:10px;min-height:44px}.filters button[aria-pressed=true]{background:var(--accent);color:#fff;border-color:var(--accent)}.filters button span{margin-left:4px;font-size:11px}.resource-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.resource{padding:24px;background:#fff;border:1px solid var(--line);border-radius:18px;display:flex;flex-direction:column}.resource-type{font-size:11px;color:var(--accent);margin-bottom:17px}.resource h3{font-size:18px;margin-bottom:14px;line-height:1.55}.resource h3 a{color:var(--ink);text-decoration:none}.resource h3 a:hover{text-decoration:underline;color:var(--accent)}.resource h3 span{color:var(--accent);font-size:16px;white-space:nowrap}.resource>p:not(.source-note){font-size:13px;color:var(--muted);margin-bottom:23px}.resource .source-note{margin-top:auto;font-size:11px}.interactive-resource{background:var(--soft);border-color:#c9d9ca}.source-policy{margin-top:24px;font-size:12px;max-width:800px}.closing{text-align:center;padding:90px 0 75px}.closing h2{font-size:clamp(24px,3vw,32px)}.closing p{color:var(--muted);font-size:14px;margin:17px 0}.closing a{display:inline-block;font-size:13px;margin-top:10px;padding:8px}footer{max-width:1120px;padding:30px 24px 40px;margin:auto;display:flex;justify-content:space-between;gap:30px;border-top:1px solid var(--line)}footer .brand{font-size:16px}footer p{font-size:11px;color:var(--muted);margin-top:9px}.footer-note{text-align:right}.footer-note .text-button{padding:7px 0}.notice{font-size:14px;padding:20px;background:var(--soft)}@keyframes pop{from{transform:translateY(4px);opacity:.4}to{transform:none;opacity:1}}
@media(min-width:1600px){.hero{padding-top:80px;padding-bottom:75px}}
@media(max-width:900px){.hero{gap:30px}.token-demo{padding:21px}.demo-heading{font-size:12px}.route-layout{grid-template-columns:150px 1fr;gap:25px}.resource-grid{grid-template-columns:repeat(2,1fr)}.lab-panel{gap:30px;padding:28px}.check-section{gap:35px}}
@media(max-width:650px){html{scroll-padding-top:90px}.header{padding:14px 20px;min-height:65px}.brand{font-size:17px;gap:7px}.brand-mark{height:29px;width:29px;border-radius:9px;font-size:24px}nav{gap:15px}nav a{font-size:12px}main{padding:0 22px}.hero{grid-template-columns:1fr;padding:39px 0 32px;gap:33px}.hero-copy h1{font-size:clamp(34px,8.8vw,48px);line-height:1.24;letter-spacing:-.05em}.hero-copy .eyebrow{font-size:11px;margin-bottom:16px}.hero-description{font-size:14px;line-height:1.9;margin:18px 0 22px}.hero-copy .button{min-height:46px;font-size:14px}.token-demo{padding:21px}.demo-heading{font-size:13px}.sentence{margin-top:22px}.sentence>span{font-size:14px;padding:8px 11px}.candidates strong{font-size:24px}.resume{align-items:flex-start;padding:20px 0;gap:13px}.resume p{font-size:14px}.resume .mini{font-size:10px}.resume-actions{flex-direction:column;align-items:flex-end;gap:3px}.resume-actions>span{font-size:11px}.resume-actions a{font-size:12px}.section{padding-top:58px}.section-intro{margin-bottom:28px}.section-intro h2{font-size:27px}.section-intro>p:last-child{font-size:14px;margin-top:13px}.section-intro .eyebrow{font-size:11px;margin-bottom:13px}.route-layout{display:block}.route-map{display:none}.stop{grid-template-columns:27px 1fr;gap:10px;padding-bottom:28px;margin-bottom:28px;scroll-margin-top:90px}.stop-content h3{font-size:21px}.stop-content>p:not(.meta):not(.source-note){font-size:14px;margin-bottom:15px}.meta{font-size:11px}.stop-number{font-size:13px}.source-note{font-size:11px}.resource-link{font-size:14px}.stop details{font-size:13px;margin-top:13px}.stop.done .stop-number{height:25px;width:25px;font-size:11px}.complete{font-size:11px;margin-top:12px}.lab-tabs{gap:22px}.lab-tabs button{font-size:13px}.lab-panel{grid-template-columns:1fr;gap:25px;padding:23px 20px;min-height:0}.lab-description h3{font-size:25px}.lab-description>p:not(.formula){font-size:13px}.lab-description h3 br{display:none}.small{font-size:11px!important}.mode-switch{margin:16px 0 12px}.mode-switch button{min-height:42px}.process-status{min-height:0}.parameter strong{font-size:30px}.lora-numbers strong{font-size:30px}.check-section{grid-template-columns:1fr;gap:28px;padding-bottom:47px}.check-section h2{font-size:27px}.check-section .eyebrow{font-size:11px;margin-bottom:12px}.check-section>div>p:last-child{margin-top:12px;font-size:13px}.quiz h3{font-size:19px}.quiz-options button{font-size:13px}#quiz-feedback{min-height:0}.filters{gap:6px;margin-bottom:20px}.filters button{font-size:11px;padding:9px 12px}.resource-grid{grid-template-columns:1fr;gap:12px}.resource{padding:22px}.resource h3{font-size:18px}.resource-type{margin-bottom:10px}.resource>p:not(.source-note){margin-bottom:17px;font-size:13px}.resource .source-note br{display:none}.resource .source-note br:after{content:" · "}.source-policy{font-size:11px}.closing{padding:60px 0 48px}.closing p{font-size:13px}footer{flex-direction:column;padding:25px 22px 30px;gap:18px}.footer-note{text-align:left}footer p{font-size:11px}}
@media(max-width:360px){.header{padding:13px 15px}main{padding-inline:17px}nav{gap:11px}.brand{font-size:15px}.brand-mark{width:26px;height:26px}nav a{font-size:11px}.token-demo{padding:17px}.sentence{gap:5px}.sentence>span{padding:8px 9px}.demo-heading{font-size:12px}.demo-heading .mini{font-size:10px}.filters button{padding:9px 10px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important}}
@media print{.header,.token-demo,.resume,.route-map,.complete,.lab-tabs,.filters,.quiz,.footer-note{display:none}.hero{display:block;padding:20px 0}.section{padding-top:30px}.route-layout,.check-section{display:block}details{display:block}.resource-grid{grid-template-columns:1fr 1fr}body{background:#fff}.stop{break-inside:avoid}.resource{break-inside:avoid}}